JP2017223530A - Pilot lamp disconnection diagnostic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pilot lamp diagnostic device that suppresses energy consumption for disconnection diagnosis and can prevent the occurrence of a disconnection failure from being overlooked.SOLUTION: A pilot lamp disconnection diagnostic device is configured to drive an object pilot lamp of a plurality of pilot lamps (3a to 3n) for a certain period for disconnection detection, and when a current is not detected from the pilot lamp during the certain period, output a signal indicating detection of disconnection.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an indicator lamp disconnection diagnosis apparatus, and more particularly to an apparatus for automatically detecting a failure due to disconnection such as lamp breakage in a large number of indicator lamps in an elevator operation panel and operation panel.

  In recent years, dedicated industrial computers are often used to control mechanical equipment. For example, a programmable logic controller (hereinafter abbreviated as “PLC”) is built in most industrial machines and controls the industrial machines.

The indicator lamps for the operation panel and operation panel of the equipment using the PLC as described above cause the PLC to turn on the indicator lamp at the time of abnormality, and the indicator lamp indicating the state corresponds to the indicator lamp corresponding to the state of the equipment. Is lit. If the indicator lamp has a disconnection failure, the state cannot be accurately indicated. Therefore, before starting operation, it is necessary to check whether the failure has occurred due to disconnection or the like.
Therefore, as a device for diagnosing a disconnection of an indicator lamp before driving, there has conventionally been a device as shown in FIG. In this disconnection diagnostic device, a PLC 2 is connected to the DC power supply device 1 and a display lamp circuit composed of a series circuit of the display lamps 3a to 3n and the display lamp drive circuits 6a to 6n is connected.

  Then, before the operation, when the operator presses the lamp test button 5 arranged on the panel surface, the lamp test input detection circuit 9 detects this and informs the diagnosis circuit 30. In response to this, the diagnostic circuit 30 energizes the indicator lamp driving circuits 6a to 6n via the output control circuit 10, and lights all the indicator lamps 3a to 3n arranged on the panel at the same time.

  In this way, the operator has confirmed that all the indicator lights 3a to 3n are turned on, and has determined that there is no abnormality in the indicator lights. In addition, the ramp test was conducted during the period left to human judgment.

  On the other hand, for the purpose of automatically checking lighting of various indicator lamps at a certain period, the elevator manager turns on all the indicator lights at regular intervals managed by the timer circuit to display Even if you forget to check the lamp regularly, the lighting check of the indicator light is performed on the equipment side at a fixed period, and the indicator lamp check of the elevator is made so that it can be found that a disconnection such as a broken ball has occurred. There is an apparatus (for example, refer to Patent Document 1).

  Also, in this indicator light check device, the elevator administrator performs other tasks by notifying the elevator administrator that the automatic check timing is informed by the sound generation device during automatic check of various indicator lights at a fixed period. However, I knew that it was a time to check the indicator lights, so that I could not overlook the simultaneous lighting timing of various indicator lights.

Japanese Patent Laid-Open No. 7-247072

  In the case of the prior art shown in FIG. 12, since all the indicator lamps are turned on simultaneously, a current of ni (n: the number of all lamps, i: current flowing through one indicator lamp) flows and n is large. The current consumption during the lamp test will be greatly increased. In addition, since a human operation is required, there is a problem that a disconnection diagnosis leaks and a failure of the indicator lamp is not noticed.

  On the other hand, in the indicator lamp check device disclosed in Patent Document 1, since the lamp burnout is performed by human judgment, there is still a possibility of check omission and judgment error. Moreover, in order to implement | achieve an automatic judgment circuit, the circuit connected again in parallel and in series is required, and the subject which increases a failure cause occurred.

  The present invention has been made to solve the above-described problems, and provides an indicator lamp diagnosis apparatus that can suppress energy consumption for disconnection diagnosis and prevent the occurrence of disconnection failure. With the goal.

  In order to achieve the above object, a diagnostic apparatus for an indicator lamp according to the present invention includes a plurality of indicator lamp circuits each composed of an indicator lamp, an indicator lamp drive circuit, and an indicator lamp current detection circuit, The indicator lamp driving circuit corresponding to the target indicator lamp is sequentially driven at a fixed time interval for disconnection diagnosis, and the current flowing through the indicator lamp is not detected by the indicator lamp current detection circuit during the fixed time. And a diagnostic circuit that outputs a signal indicating disconnection detection.

  In order to achieve the above object, a diagnostic apparatus for an indicator lamp according to the present invention includes a plurality of indicator lamp circuits each constituted by an indicator lamp, an indicator lamp driving circuit, and an indicator lamp current detection circuit, and a lamp test. A button and an input detection circuit of the lamp test button, and a short time that cannot be visually recognized that is set only when the input detection circuit detects that the lamp test button is input. The indicator lamp driving circuit corresponding to the target indicator lamp is simultaneously driven for a certain period of time for disconnection diagnosis, and a disconnection is detected when no current flowing through the indicator lamp is detected by the indicator lamp current detection circuit during the certain period of time. And a diagnostic circuit for outputting a signal indicating the above to the display device.

  Furthermore, in order to achieve the above object, a diagnostic apparatus for an indicator lamp according to the present invention includes a plurality of indicator lamp circuits each composed of an indicator lamp and an indicator lamp drive circuit, and is common to all of the indicator lamp circuits. One indicator light current detection circuit and whether the indicator lamp driving circuit is sequentially driven corresponding to the target indicator lamp among the indicator lamps, and whether or not a current flows to the indicator lamp corresponding to this time And a diagnostic circuit for outputting an alarm signal indicating disconnection detection when the current flowing through the indicator lamp is not detected by the common current detection circuit.

  According to the disconnection diagnosis device for an indicator lamp according to the present invention, a target indicator lamp among a plurality of indicator lamps is driven for a certain period of time for detecting a disconnection, and the current of the indicator lamp is detected during that period of time. Since it is configured to output an alarm signal indicating disconnection detection when it is not done, it can reduce energy consumption and automatically notify the indicator light disconnection failure with an alarm, eliminating the need for worrying about operational leaks. The interval and lighting time can be changed.

It is a circuit block diagram which shows Embodiment 1 of the disconnection diagnostic apparatus of the indicator lamp which concerns on this invention. It is a flowchart for demonstrating operation | movement of the diagnostic circuit used for FIG. It is a circuit block diagram which shows Embodiment 2 of the disconnection diagnostic apparatus of the indicator lamp which concerns on this invention. It is a flowchart for demonstrating operation | movement of the diagnostic circuit used for FIG. FIG. 3 is a diagram showing a third embodiment of the indicator lamp disconnection diagnostic apparatus according to the present invention using the diagnostic circuit used in FIG. 1, in which FIG. (1) is a flowchart and FIG. (2) is a time chart. . It is a circuit block diagram which shows Embodiment 4 of the disconnection diagnostic apparatus of the indicator lamp which concerns on this invention. It is a flowchart for demonstrating operation | movement of the diagnostic circuit used for FIG. It is a circuit block diagram which shows Embodiment 5 of the disconnection diagnostic apparatus of the indicator lamp which concerns on this invention. It is a flowchart for demonstrating operation | movement of the diagnostic circuit used for FIG. It is a circuit block diagram which shows Embodiment 6 of the disconnection diagnostic apparatus of the indicator lamp which concerns on this invention. It is a flowchart for demonstrating operation | movement of the diagnostic circuit used for FIG. It is a circuit block diagram which shows the disconnection diagnostic apparatus of the indicator lamp by a prior art example.

  Hereinafter, each embodiment of the disconnection diagnostic device for an indicator lamp according to the present invention will be described with reference to the accompanying drawings.

Embodiment 1 FIG.
In FIG. 1 showing the present embodiment, the indicator lamps 3a to 3n, the indicator lamp driving circuits 6a to 6n, and the indicator lamp current detection circuits 7a to 7n are respectively configured as indicator lamp circuits, and a total of n indicator lamp circuits. Is different from the conventional example shown in FIG. 12 in that each of the indicator lamp circuits is provided with indicator lamp current detection circuits 7a to 7n.

  The diagnostic circuit 20 in FIG. 1 includes the output control circuit 10 for the indicator lamp drive circuits 6a to 6n as in FIG. 12, and the input confirmation circuit 11 that determines the presence or absence of signals from the indicator lamp current detection circuits 7a to 7n. The operation control circuit 12 for controlling the lighting timing of the indicator lamps 3a to 3n, the setting device 13 for storing the lighting timing (ON time) of the indicator lamps 3a to 3n, the lighting timing and the current flowing through the indicator lamps 3a to 3n. And a disconnection detection circuit 14 that makes the determination in synchronization with each other. Further, an alarm device driving circuit 8 for driving the alarm device 4 is connected to the output control circuit 10.

  The setting device 13 sends a control signal to the operation control circuit 12, and the operation control circuit 12 energizes the indicator lamp drive circuits 6 a to 6 n via the output control circuit 10 and also to the disconnection detection circuit 14. Also inform this. The input confirmation circuit 11 inputs output signals from the indicator lamp current detection circuits 7 a to 7 n and sends the results to the operation control circuit 12 and the disconnection detection circuit 14. The disconnection detection circuit 14 sends the detection result to the setting device 13 and the operation control circuit 12. The operation control circuit 12 drives the alarm device 4 by energizing the alarm device drive circuit 8 via the output control circuit 10. At the same time, the abnormal content is displayed on the graphic display device 18.

  In FIG. 10, the lamp test button 5 and the lamp test input detection circuit 9 are used. However, in the first embodiment, these are not provided. In addition, it is assumed that there are n = 14 indicator lights as an example.

Next, the operation of the present embodiment will be described with reference to the flowchart of FIG.
Normally, the failure of the indicator lamps 3a to 3n is a disconnection, and a phenomenon is used in which a current flows through the target indicator lamp when it is normal and a current does not flow when it is abnormal. For the status display and failure display, the diagnostic circuit 20 determines the conditions and turns on / off the indicator lamps 3a to 3n. First, the indicator lamp to be lit will be described.

First, in the setting device 13, a diagnostic cycle and a lighting time and a light-off time constituting the diagnostic cycle are set in advance. Therefore, the operation control circuit 12 starts the following operation for each diagnosis cycle.
The operation control circuit 12 gives the output control circuit 10 a lighting command as to which of the indicator lamps should be turned on after the extinguishing time in the diagnosis cycle has elapsed (YES in step S1). In response to this, the output control circuit 10 gives a command to any one of the indicator lamp driving circuits 6a to 6n, supplies power from the power supply device 1 to the target indicator lamps 3a to 3n, and lights them (step S2). At this time, a current necessary for lighting the indicator lamps 3a to 3n flows, and this current is interrupted when the indicator lamp breaks down.

  Accordingly, the current state is detected in the corresponding circuit in the indicator lamp current detection circuits 7a to 7n (step S3), and the state is transmitted to the disconnection detection circuit 14 via the input confirmation circuit 11. The disconnection detection circuit 14 obtains the lighting target from the operation control circuit 12, inputs current information from the indicator lamp corresponding to the lighting command from the input confirmation circuit 11, and determines whether the indicator lamp is disconnected based on its synchronization. If it is determined that they are not synchronized (NO in step S3), the drive circuit 8 is driven to issue an alarm from the alarm device 4 (step S4). When the alarm is generated, the broken indicator lamp is displayed on the graphic display device 18 (step S5).

  Thus, since the diagnosis period and the lighting time for diagnosis are set in the setting device 13 in advance, when a certain time has elapsed since the start of turning off (YES in step S1), the operation control circuit 12 outputs the output control circuit. The lighting command for the lighting time stored in advance in the setting device 13 is given to 10 (step S2). However, this time is about 2 milliseconds, which is a short time that cannot be judged by human vision. The state of the current for a short time is detected as described above to determine whether the indicator lamp is broken.

When it is found from the diagnostic results at the time of turning on and off that the current has been interrupted as described above, the operation control circuit 12 drives the alarm device driving circuit 8 via the output control circuit 10 to sound the alarm device 4 ( Step S4). In making a diagnosis, in the above description, the time is measured after the light is turned off. However, the diagnosis may be made at a fixed period regardless of the light-off.
In this way, since the light is lit only for a very short time, it does not affect human vision. That is, when confirming the conventional indicator lights, all the indicator lights are turned on simultaneously by button operation, and in order for the operator to confirm that all the indicator lights are turned on, it is displayed continuously for about 2 seconds. Although it is necessary, in this embodiment, since the confirmation work performed at one time is completed in about 2 milliseconds, the energy consumption for confirming the abnormality of the indicator lamp can be reduced to about 1/1000.

  The usage application of the indicator lamp is not limited. For example, a status indicator lamp, a warning indicator lamp, a numerical indicator lamp, and the like can be given. Also, the type of the indicator lamp is not limited, such as an LED or an incandescent bulb. Furthermore, it is not limited to the kind of direct-current power supply, For example, there exist DC1.5V, DC12V, DC24V, DC100V etc. with a dry cell and a battery power supply.

Embodiment 2. FIG.
FIG. 3 showing the present embodiment is different from the indicator lamp disconnection diagnosis apparatus according to the first embodiment shown in FIG. 1 in that a lamp test button 5 and its input detection circuit 9 are added.

  That is, in the first embodiment, the diagnosis is performed with a certain time interval at the time of turning off (step S1 in FIG. 2), but in this embodiment, as shown in the flowchart in FIG. Only when the lamp test button 5 is operated (step S11), the operation is executed (steps S12 to S15) as in the first embodiment.

In the second embodiment, the operation procedure is the same as that of the existing diagnosis, and can be performed without hesitation. When the operator operates the lamp test button 5, the input detection circuit 9 recognizes it and transmits it to the operation control circuit 12 to give a lighting command for a diagnostic lighting time stored in advance. Thereafter, the operation is the same as that in the first embodiment (steps S12 to S15). However, the operation is performed only when the button is operated, but in the conventional operation, the operator confirms that all the indicator lights are lit simultaneously. For this reason, the display is made for about 2 seconds. However, in this embodiment, since it is finished for about 2 milliseconds, the energy consumption for confirming the abnormality of the indicator lamp can be reduced to about 1/1000.
However, since the lighting time is extremely short, a display process in the graphic display device 18 in step S15 is necessary to notify the broken indicator lamp.

Embodiment 3 FIG.
The present embodiment can use the same configuration as the indicator lamp disconnection diagnosis apparatus according to the first embodiment shown in FIG. That is, in FIG. 1, the diagnosis is performed at the time of turning on and off, but in the present embodiment, as illustrated in the time chart of FIG. The disconnection detection circuit 14 outputs the disconnection diagnosis signal B only when the lighting signal A for displaying the state after the belt conveyor operation is completed.

  That is, the indicator light is turned off when the operation of the belt conveyor is not completed, but there is no problem even if the failure occurs at this time. However, when the operation is completed, lighting for status display is performed, and an alarm may be generated and displayed when current does not flow due to disconnection or the like at this time.

  As shown in the flowchart of FIG. 5 (1), it is determined when the lamp is turned on or off (step S21), and only when the lamp is turned on for status display (YES in step S21), current is detected (step S22). An alarm is generated and displayed on the graphic display device 18 (step S23).

  As a result, the number of components can be reduced, and the consumption of electrical energy can be minimized by checking the disconnection when the indicator lamp is turned on.

Embodiment 4 FIG.
FIG. 6 showing the present embodiment shows the indicator lamps 3a to 3n and the current detection circuit 7a, each of which constitutes the indicator lamp circuit, with respect to the indicator lamp disconnection diagnostic apparatus according to the first embodiment shown in FIG. ˜7n and drive circuits 6a to 6n are different from each other in that current limiters 15a to 15n are added.

  In other words, in the first embodiment, although a current for turning on the indicator lamp flows, the energy consumption still occurs at the instant of diagnosis. In order to reduce this, it is based on the fact that disconnection diagnosis is possible if the current detection circuits 7a to 7n can detect the lighting current even if the current limiters 15a to 15n receive current limitation and the lighting cannot be visually recognized. ing.

  In the fourth embodiment, in the case of a normal lighting command, the current limiters 15a to 15n are bypassed to light up brightly. On the other hand, at the time of diagnosis, the bypass circuit is opened, the current flowing through the indicator lamps 3a to 3n is limited, and the lamp is lit darkly. By turning it on more dimly in a short time, it is impossible for human eyes to recognize it at all, and the electric energy consumed can be suppressed.

  For this reason, control lines from the output control circuit 10 are connected to the current limiters 15a to 15n, but are omitted for convenience of illustration. Moreover, these current limiters 15a-15n may open a bypass circuit all at once, and may open a bypass circuit only when driving the target indicator lamp.

  FIG. 7 shows a flowchart of the present embodiment. In this flowchart, steps S21 to S23 are the same as those in the fourth embodiment shown in FIG. 5, but steps S26 to S29 and step S25 are executed without returning from step S22 to step S21. Of these steps, steps S26, S28, S29, and S25 are the same processes as steps S1 to S4 in FIG.

  That is, after a predetermined time (light-out time) has elapsed from step S21 (YES in step S26), the corresponding current limiters 15a to 15n are turned on (step S27), and steps S28, S29, and S25 are performed in the same manner as described above. Run.

Embodiment 5. FIG.
FIG. 8 showing the present embodiment is such that the current detection circuits 7a to 7n are individually arranged in the indicator lamps 3a to 3n, like the indicator lamp disconnection diagnosis apparatus according to the above-described embodiment 1 shown in FIG. Instead, the difference is that one common input detection circuit 16 is arranged at the common connection between the power source 1 and the indicator lamps 3a to 3n. As a result, in the other embodiments, as many current detection circuits as the number of indicator lamps are required, but in this embodiment, the current detection circuits can be realized by one current detection circuit.

  FIG. 9 shows the operation of the present embodiment. First, it is confirmed that all the circuits are OFF and no current is flowing (step S31). Next, only the first indicator lamp 3a is turned on for a certain period of time for disconnection detection similar to the above to make a diagnosis (steps S32 to S33). Thereafter, the second indicator lamp 3b is turned on to perform diagnosis (steps S34 to S35). This is repeated until the nth indicator lamp 3n (... Steps S36 to S37). If no current can be detected in steps S33, S35,... S37, an alarm is generated (step S38). As a result, the human eye can recognize only the steady lighting state, but the diagnosis can be performed sequentially.

Embodiment 6 FIG.
FIG. 10 showing the present embodiment is different from the indicator lamp disconnection diagnosis apparatus according to the first embodiment shown in FIG. 1 in that a trend recording circuit 17 is installed at the output of the disconnection detection circuit 14. Yes.

  That is, in addition to the first embodiment, the disconnection detection result of the disconnection detection circuit 14 is stored in the trend recording circuit 17 together with the diagnosis time, lighting state, and the like. As a result, the lighting time can be grasped from the lighting state, and it can be used for maintenance in combination with the life judgment and the diagnosis time and the diagnosis result.

  A flowchart of the present embodiment is shown in FIG. In this flowchart, steps S1 to S are the same as those in the first embodiment except for step S6 in which the diagnosis result and the like are stored in the trend recording circuit 17.

1: DC power supply device 2: PLC
3a to 3n: Indicator lamp 4: Alarm 5: Lamp test button 6a to 6n: Indicator lamp drive circuit 7a to 7n: Indicator lamp current detection circuit 8: Alarm instrument drive circuit 9: Lamp test input detection circuit 10: Output control circuit 11: Input confirmation circuit 12: Operation control circuit 13: Setting device 14: Disconnection detection circuit 15: Current limiter 16: Common input detection circuit 17: Trend recording circuit 18: Graphic display device 20: Diagnostic circuit

Claims (6)

A plurality of indicator lamp circuits each composed of an indicator lamp, an indicator lamp driving circuit, and an indicator lamp current detection circuit;
The indicator lamp driving circuit corresponding to the target indicator lamp among the indicator lamps is sequentially driven at a predetermined time interval for disconnection diagnosis, and the current flowing through the indicator lamp by the indicator lamp current detection circuit during the predetermined time period. An indicator lamp disconnection diagnosis device comprising: a diagnosis circuit that outputs a signal indicating disconnection detection when no signal is detected. A plurality of indicator lamp circuits each composed of an indicator lamp, an indicator lamp driving circuit, and an indicator lamp current detection circuit;
A lamp test button and an input detection circuit for the lamp test button;
The indicator lamp drive corresponding to the target indicator lamp among the indicator lamps within a short time that cannot be visually recognized that is set only when the input detection circuit detects that the lamp test button has been input. A diagnostic circuit for simultaneously driving the circuit for a predetermined time for disconnection diagnosis and outputting a signal indicating disconnection detection to the display device when the current flowing through the display lamp is not detected by the display lamp current detection circuit during the predetermined time; Indicator light breakage diagnosis device equipped with. 2. The indicator lamp according to claim 1, wherein the diagnostic circuit outputs an alarm signal indicating a disconnection detection when the current flowing through the indicator lamp is not detected by the indicator lamp current detection circuit only when the status indicator lamp is turned on. Disconnection diagnostic device. The indicator lamp circuit is a current limiter that limits the indicator lamp current to a light intensity level such that the indicator lamp current detection circuit can detect the indicator lamp current even when the indicator lamp is driven but cannot be visually recognized. An indicator lamp disconnection diagnosis device according to claim 1 or 3, further comprising: A plurality of indicator lamp circuits each composed of an indicator lamp and an indicator lamp driving circuit;
One indicator light current detection circuit common to all the indicator lamp circuits;
The indicator lamp driving circuit is sequentially driven corresponding to the target indicator lamp among the indicator lamps, and whether or not a current flows to the indicator lamp corresponding to this time is indicated by the common current detection circuit. An indicator lamp disconnection diagnosis device comprising: a diagnosis circuit that outputs an alarm signal indicating disconnection detection when no current flowing through the lamp is detected. The indicator lamp disconnection diagnosis device according to any one of claims 1 to 5, further comprising a recording unit that stores a diagnosis result in the diagnosis circuit.

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